Apparatus for spraying liquid metal.



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G. OSTBRMANN APPARATUS FOR SPRAYiNG LIQUID METAL.

APPLICATION FILED MAR. 31, 1913- Patented May 5, I914.

aw WW G OSTERMANN.

APPARATUS r011 sranme LIQUID METAL. APPLICATION FILED MAR; 31, 1918.

I 1,095,414, I Patented May 5,1914.

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' 20 3-503 I fitezzhfl- UNITED sTATEs PATENT o EToE.

GUSTAV OSTERMANN, OF COLOGNE-RIEHL, GERMANY.

APPARATUS FOR SPRAYING LIQUID METAL.

Specification of Letters Patent.

- Patented May 5, 1914.

Application filed March 31, 1913. Serial No. 758,009.

To a?! whom it may concern:

I a subject of the Kin dent at Cologne-Ric l, in the Province of Be it known that I, GUs'rAv OsTERiiANN,

of Prussia, and F631- the Rhine, Kindom of Prussia, Germa Empire, have lnvented certain new and useful Apparatus for Spraying Liquid Metal, ofwhich the following is a specification.

It is already known to provideobjects of all kinds with a metal coating by blowing the liquid metal in the form of spray upon the object. Various devices are known whereby this effect can be attained, and among other devices in which the liquid metal placed in an open container is sprayed by means of an ejector placed below the level of the liquid and discharging outward, in front of which there is fixed a long tube (dividing duct or mixing tube).

According to this invention it has been found advantageous in the application of i the aforesaid invention to make the distance of the ejector from the mixing tube'capable of being exactly regulated and moreover without causing the position of the suction point to be altered in consequence of this regulation.

For this purpose according to this invention two modifications have been devised which are illustrated respectively the first in Figures 1 to 3 and the second in Fig. 4.

- Acommon adjustment of the ejector conveying the pressure fluid .and of the long mixing tube carrying the spraying duct, is rendered possible by the displacement of both parts. It is therefore not merely, as was foreshadowed in previous constructions, that the adjustment of the ejector duct only,

i but-also the mixing tube should be movable in both directions.

In a further modification of the ejectorduct and of the mixing .tube, not only is the relative distance apart of these two members but also the cross section both of the ejector and also of the metal supply opening constructed adjustable so that the continuity of the stream and the strength of the vacuum or the thickness of the pressure fluid'st-neam can be regulated at will. In this construction it is therefore possible, independently of one another, to

alter the size of the -entrance'opening for the metal and that of the distance of-the" ejector from the orifice of the mixing tube.

and finally also the diameter of the ejector duct itself. It is only by these three capabilities for adjustment that the requisite power of control of the shower of metal container duct and the mixing tube on an enlarged scale. Fig. 3 shows a transverse section on the line A--A of Fig. 1 Fig. 4 a modification of the regulating mechanism illustrated in section. Fig. 5 is a longitudinal section through a partof the device shown in Fig. 7. Fig. 6 is a transverse section on the line .-\.B, of Fig. 5. Fig; 7 shows a modification of the invention relating'to the coating of the interior of hollow bodies.

In the construction shown in Figs. 1 to 3, a. is an outer casing and e a liquid metal in 1 said casing. fluid, preferably heatethflows through the tube a coiled at 7) and out through the'ejector duct (1. This latter is screwed into a tubular sleeve (1 which is built into the crucible 6. 'Into this sleeve dthe mixing tube f is adjustably screwed from the other side.

The sleeve (l possesses openings 9 which.

serve for conducting the metal In front of the ejector duct 0. By the alternate screwing of the tube f and sleeve (Z, having the and of the tube f with regard to the openings 7 can be increased or diminished. by closing or opening the said openings. The heating takes tube h.

In the construction illustrated in Fig. 4,

the mixing tube f is likewise adjustable by screwing, whereas the tube bearing the ejector duct 0 is displaceable in a straight line in the manner of a sliding guide. The displacement can, for instance. be effected by means of the set screw i, which engages in the projection l. The aperture of the ejector duct regulatable by'm ea-ns of aslide The pressure holes the position of the point of the duct place by means of the gas" Z, which is also preferably controlled by means of the set screw on. In this instance also the diameter of the metal supply opcn-' ing 9 as well as the position of the tubes f and r to this opeinng are mutually re'gudated by the adjustment of these parts.

In the further modification illustrated in Figs. 5 and 6 a special method of heating comes into use. Fig. 5 shows a longitudinal section through the important part of the device which comes into consideration and Fig. 6 shows a transverse section on the line AB of Fig. 5. In these figures Z is the already known receptacle for holding the liquid metal which is to be sprayed. In this receptacle there is placed a hollow cylinder 18, which is soarranged that it is surrounded outside by the liquid metal and stands at its front opening in full connection with the space outside the receptacle. In this hollow cylinder 18 the two ducts 19 and 20, which are connected together by the sleeve21, are placed in such a manner that between the wall of the hollow cylinder 18 and the two ducts there-reniains an annular space 22, which space stands at the ends'in communication with the outside space and to which consequently the superfluous metal cannot pass. This can, however, reach the orifice of the duct 19 through the vertical tubes 23 from the lower part of the container 1, so that pressure gas, which is introduced through the tube 24, can impel the liquid metal and drive it through the tube 20, which is somewhat expanded outward.

From this tube 20 the metal then passes in well known manner out in the form of fine spray which is thrown with a certain force against the surface which is to be covered. Moreover the burner ducts 14, of which in the drawing only one is visible, are provided; these are supplied, through a tube 13, with combustible gas (hydrogen, lighting gas or the like) and are so arranged that the flames from the burning gases enter into the hollow space 22. In this manner both the pressure duct 19 and the tube 20 are heated in a very favorable manner together with the metal which is in the receptacle Z round about the hollow cylinder 18. The vertical tube 25 serves only for the cleansing of the duct connection. The modification shown in Fig.7 relates to a construction of the above described kind which renders possible in a peculiarly easy manner the production of a metal coating upon the inside of hollow bodies. aforesaid receptacle. for the reception of the liquid metal which is to be sprayed. The inner arrangement of thisreceptacle is unimportant in regard to the present improvement. It need only be stated that by the already knowirtube 20 the sprayed metal is propelled outward, that the heating takes place by means of the burner ducts 14:, and that the pressure gas made use of for the spraying is brought in through the tube 24.

The improvement consists in the feature that the metal container 1 is connected With respective tubes is not interrupted.

In this Z indicates the the hollow handle 9, through which the heating gas flows out, and with the tube 7 for the conveyance of the pressure gas, in such a manner that renders it possible to effect the various angular positions of the con tainer 1 in regard to the handle 9 without stoppage of the gas supply. For this purpose the head of the handle 9 is formed as a disk 26, against which is applied another rotatable disk 27. In the disk 26 are provided channels 28 and 29 for connection to the tubes 9 and 7 whereas in the disk 27 corresponding channels 30 and 31 are provided different channels are obviously, at least at for-connection to the tubes 7 and 24. These the places where they pass from one disk to another, so constructed that on the turning of the disk 27 the connection between the Consequently the container 1 can be so swung out that also the inner surface of hollow bodies can be conveniently coated with the metal spray expelled from the tube 20.

What I claim and desire to secure is,-

1. In apparatus of the character described a crucible, an outer casing over said crucible, an inwardly threaded sleeve in said crucible having lateral openings intermediate its ends, an ejector vtube threaded into said sleeve having its vent in the vertical plane of said openings, a longitudinally adjustable mixing tube threaded into said sleeve from the outer side thereof, and in alinement with said ejector tube, and means for heating said metal, as described.

2. In apparatus of the character described anouter casing, a crucible in said casing, a sleeve provided with openings in said crucible, an ejector tube and a mixing tube longitudinally movable in said sleeve whose inner ends are in theplane of the openings in said sleeve and adapted to control the slze of said openings, means to supply fluid pressure to the ejector tube, and means to said casing and spaced therefrom, a sleeve in said container, an ejector tubeconnected with asource of fluid pressure, longitudinally adjustable in said sleeve, a longitudinally adjustable mixing tube in said sleeve there being openings in the middle portion means to heat the metal as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses. j

@USTAV OSTERMANN.

Witnesses:

BEssIE F. DUNLAP, LOUIS VANDORY.

of said sleeve, into said container, and the openings in said sleeve are ad usted, and 

